package com.itheima.reggie.controller;

import com.itheima.reggie.Utils.Demo;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;
    @PostMapping("upload")
    public R<String> upload(MultipartFile file) throws Exception {
        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info("file:{}", file);
        String originalFilename = file.getOriginalFilename();
        String substring = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName = UUID.randomUUID().toString() + substring;
        InputStream inputStream = file.getInputStream();
        Demo.upload(fileName,inputStream);
        /*File dir = new File(basePath);

        if (!dir.exists()) {
            dir.mkdirs();
        }
        try {
            //将临时文件转存到指定位置
            file.transferTo(new File(basePath+fileName));
        }catch (IOException e){
            e.printStackTrace();
        }*/
        return R.success(fileName);
    }
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
        /*try {
            FileInputStream fileInputStream = new FileInputStream(basePath + name);
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            outputStream.close();
            fileInputStream.close();
        }catch (Exception e){
            e.printStackTrace();
        }*/

        Demo.download(name, response.getOutputStream());
    }
}
